The frequency of LTE network FDD:Band1/3; TD-LTE:Band38/39/40/41 (2555~2655MHz); UMTS (WCDMA) /HSPA+/DC-HSDPA:900/2100MHz (Band8/1); TD-SCDMA:Band34/39; CDMA (3G): BC0 (800MHz); CDMA (2G): BC0 (800MHz); GSM: 900/1800/1900MHz; Vice Principal Card: Card: 900/1800/1900MHz. (Note: support for blind insertion, SIM1 or SIM2 can be set up the main card or vice card. The networks and bands in each region may be different, depending on the local operators and where you are.